/Engine/Source/Runtime/Engine/Classes/Animation/BlendSpace.h
Sorts the PerBoneBlend data into a form that can be repeatedly used in GetPerBoneInterpolationIndex
virtual [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [IInterpolationIndexProvider::FPerBoneInterpolationData](API\Runtime\Engine\IInterpolationIndexProvider\FPerBoneInterpolationData) > GetPerBoneInterpolationData ( const [USkeleton](API\Runtime\Engine\Animation\USkeleton) * Skeleton ) const